Exchange 2003 (SP2) - OWA rejects all valid login requests on both my servers. Help ! Need to fix this before I go home tomorrow.

Hi all,
Having spent two weeks migrating our 3 offices in Hong Kong , Shanghai and Singapore to a Windows 2003 AD with Exchange 2003 and ISA2004, I left the easy job of publishing the OWA rule to the end as I've never had problems with it it the past (works in Europe and the US).

Everything is working exactly as I would like it. The domain is replicating nicely (all dcdiags are 100% clean), ISA is doing a great job as a firewall and is caching nicely. And the two exchange servers (one in HK and one in Singapore) are sending/receiving mail for their own regional e-mail domains.

In what way does the authentication fail? Does it keep on popping up the login box (eventually failing), or does it say something like '401 - Unauthorized' as soon as you supply the credentials?

It will help to compare the IIS logfiles on both servers, to see what is different about the unsuccessful access attempts. Most significantly, see if IIS is recording any usernames for the failed attempts. If there is no username, then the logon is simply failing (bad password, unrecognized user, no permission to logon to the server). If there is a username logged, then the logon has succeeded, but the user has no permission to access a resource on the server.

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